Method and system for detecting special chemical substance in the detected object

Abstract

The invention pertains to the field of trace chemical substance detection, relates to a method and system for detecting whether special chemical substance is contained in the detected object. The method includes delivering sample of the detected object to a probe comprising nano-scale surface structure in order to make the sample in contact with the nano-scale surface structure; irradiating the nano-scale surface structure with a laser beam; scattering the laser beam by the sample and the nano-scale surface structure in order to generate a scattered light; obtaining the spectrum of the scattered light; analyzing the spectrum signal by a spectrum analyzer in order to detect whether special chemical substance is contained in the detected object. The invention provides simple and non-invasive detection method, which is convenient for carrying and easy to operate. The method and the system can be applied in fields of counter-terrorism, criminal investigation, medical diagnosis, disease prevention, industrial process monitoring, environment cleaning and monitoring, counterfeit goods detection, product identification, detection of methanol and ethanol content in alcohol, quality control of food and medicament or the like.

Description

[0001] This application claims the priority of US Patent Application No. 12 / 176,383 and US Patent Application No. 12 / 246,616. Among them, the U.S. Patent Application No. 12 / 246,616 is a part of the continuation (CIP) application of the pending U.S. Patent Application No. 12 / 176,383 that is jointly assigned and is in the examination process. A partial continuation patent application of the U.S. Patent Application No. 11 / 681,157 under examination. The pending U.S. Patent Application No. 11 / 681,157 in the examination process was filed on March 1, 2007 with the name "Hen Quantitative chemical optical probe". The US patent application No. 11 / 681,157 is a continuation of the jointly assigned US patent application No. 10 / 987,842 (now authorized as US No. 7,242,469), and the US patent application No. 10 / 987,842 is in May 2004. A partial continuation of the US patent application No. 10 / 852,787 (now authorized as US No. 7,384,792) filed on the 24th. The US Patent Application No. 10 / 852,...

AI Technical Summary

Problems solved by technology

Due to the limited availability of non-contaminating nanostructured precious metal surfaces, even trace chemicals can be detected at parts-per-billion (ppb) levels, using SERS and SERRS to detect explosives and / or other trace chemicals The application of material technology is still very limited

[0006] However, the existing literature does not provide an effective method to fabricate and encapsulate non-polluting nanostructured precious metal surfaces for field application of SERS and SERRS techniques to detect trace chemicals.

In addition, the existing literature does not provide a method to fabricate nanostructured materials with well-controlled nanoarrays requiring size-reduced and optimized nanoparticles, and the surface of these nanoparticles The distance is also reduced and optimized for enhanced scatter signal

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